918225 has 72 divisors (see below), whose sum is σ = 2089152. Its totient is φ = 374400.

The previous prime is 918223. The next prime is 918257. The reversal of 918225 is 522819.

It is not a de Polignac number, because 918225 - 2¹ = 918223 is a prime.

It is a Curzon number.

918225 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918225.

It is not an unprimeable number, because it can be changed into a prime (918223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17299 + ... + 17351.

It is an arithmetic number, because the mean of its divisors is an integer number (29016).

2⁹¹⁸²²⁵ is an apocalyptic number.

It is an amenable number.

918225 is an abundant number, since it is smaller than the sum of its proper divisors (1170927).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

918225 is a wasteful number, since it uses less digits than its factorization.

918225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 79 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 918225 is about 958.2405752211. The cubic root of 918225 is about 97.1962936147.

It can be divided in two parts, 9 and 18225, that multiplied together give a square (164025 = 405²).

The spelling of 918225 in words is "nine hundred eighteen thousand, two hundred twenty-five".